<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>21-jQuery文本值操作方法</title>
    <script src="./js/jquery-1.12.4.js"></script>
    <script>
      $()
    </script>
</head>
<body>
    <button>设置html</button>
    <button>获取html</button>
    <button>设置text</button>
    <button>获取text</button>
    <button>设置val</button>
    <button>获取val</button>
</body>
</html>